Display screen or portion thereof with transitional graphical user interface



FIG. 1 is the first image in a sequence for a display screen or portion thereof with transitional graphical user interface showing my new design;

FIG. 2 is the second image thereof;

FIG. 3 is the third image thereof;

FIG. 4 is the fourth image thereof;

FIG. 5 is the fifth image thereof;

FIG. 6 is the sixth image thereof;

FIG. 7 is the seventh image thereof;

FIG. 8 is the eighth image thereof;

FIG. 9 is the ninth image thereof;

FIG. 10 is the tenth image thereof;

FIG. 11 is the eleventh image thereof;

FIG. 12 is an enlarged view of the claimed region of the display screen or portion thereof with transitional graphical user interface shown in FIG. 1;

FIG. 13 is an enlarged view of the claimed region of the display screen or portion thereof with transitional graphical user interface shown in FIG. 2;

FIG. 14 is an enlarged view of the claimed region of the display screen or portion thereof with transitional graphical user interface shown in FIG. 3;

FIG. 15 is an enlarged view of the claimed region of the display screen or portion thereof with transitional graphical user interface shown in FIG. 4;

FIG. 16 is an enlarged view of the claimed region of the display screen or portion thereof with transitional graphical user interface shown in FIG. 5;

FIG. 17 is an enlarged view of the claimed region of the display screen or portion thereof with transitional graphical user interface shown in FIG. 6;

FIG. 18 is an enlarged view of the claimed region of the display screen or portion thereof with transitional graphical user interface shown in FIG. 7;

FIG. 19 is an enlarged view of the claimed region of the display screen or portion thereof with transitional graphical user interface shown in FIG. 8;

FIG. 20 is an enlarged view of the claimed region of the display screen or portion thereof with transitional graphical user interface shown in FIG. 9;

FIG. 21 is an enlarged view of the claimed region of the display screen or portion thereof with transitional graphical user interface shown in FIG. 10; and,

FIG. 22 is an enlarged view of the claimed region of the display screen or portion thereof with transitional graphical user interface shown in FIG. 11.

In the drawings, the dot-dash broken lines represent unclaimed boundary lines and form no part of the claimed design. The dash-dash broken lines are for the purpose of illustrating portions of a display screen or portion thereof with transitional graphical user interface that forms no part of the claimed design. 

CLAIM I claim the ornamental design for a display screen or portion thereof with transitional graphical user interface, as shown and described. 